PDF malware analysis — malicious · 1fcef3f0d6dd5891

MALICIOUS

PDF

74.0 KB Created: 2021-09-17 07:09:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 950855b41088c25ccc46b567497699a7 SHA-1: ae1a73cbdba0b7beb64bce6e4e3e4c7ba31027bf SHA-256: 1fcef3f0d6dd589191d5f58390c64211604f8597f4e7e7e8ebb61bd555aaaed3

134 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9827

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://philabc.ru/uplcv?utm_term=owl+house+season+2+watch+free PDF link annotation
- http://sziszolg.hu/editor_up/jolawasotevakig.pdfIn PDF document text
- https://tmtteks.com/files/94267662998.pdfIn PDF document text
- http://gapp.fr/medias/files/16541821204.pdfIn PDF document text
- https://shevtsov-art.com/uploads/files/87051386268.pdfIn PDF document text
- https://timminsrenovations.ca/file/r61xChbAehXVpCmq.pdfIn PDF document text
- http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a942e865c3---memodowetado.pdfIn PDF document text
- https://printsolutions.ro/uploads/wysiwyg/files/dovelurufenuwunif.pdfIn PDF document text
- http://myhomeinparis.com/userfiles/files/25595642795.pdfIn PDF document text
- http://malifer.hu/upload/file/koxokunakejagowujidusek.pdfIn PDF document text
- http://diegogenna.it/userfiles/files/58924645034.pdfIn PDF document text
- http://kelvista.lt/images/files/jowufedojojubudavunezomik.pdfIn PDF document text
- https://toyotaautobody.com/ckfinder/userfiles/files/kituzanipivudewaregipo.pdfIn PDF document text
- http://area100impianti.it/userfiles/files/fuzizozujo.pdfIn PDF document text
- http://lexus-custom.com/js/upload/files/51404646312.pdfIn PDF document text
- http://copy-office.it/userfiles/file/96528402070.pdfIn PDF document text
- http://iberryhomemade.com/userfiles/files/kawaxerozidezagotidirem.pdfIn PDF document text
- http://zamaro.cz/images/fcke_files/file/lidagilarafenited.pdfIn PDF document text
- https://mgs-on-track.com/uploads/misc/files/20923760059.pdfIn PDF document text
- http://clear-es.net/yamituki-n/uploads/files/dobajiwunesuritado.pdfIn PDF document text
- http://www.clc-engineering.com/siteuploads/editorimg/file/kojakavojorufakegejex.pdfIn PDF document text
- http://ecogestval.com/userfiles/file/razexijevogiru.pdfIn PDF document text
- http://mientaytourist.com/uploads/files/makafirojib.pdfIn PDF document text
- http://ombs.ru/uploads/files/30554992359.pdfIn PDF document text
- http://eiffelflowersquesnel.com/userfiles/file/38748753995.pdfIn PDF document text
- http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/99988920540.pdfIn PDF document text
- http://tcsklife.com/filespath/files/20210909193714.pdfIn PDF document text
- http://kraemer-duennebacke.de/files/file/dolojesof.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bdda.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDDA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d5f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD5F1	10672 bytes
SHA-256: `6eb0ce7a13f986f67e47a98b61b7abecf6d07514a90047f4d42236248e35f994`
`font_02_sfnt_off0000ee85.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE85	17004 bytes
SHA-256: `96b96de83443a9bb153bc3bc02661baf66ff4d4e6a84f87545836c29c4f459c1`

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